This paper briefly analyzed some problems and limitations of existing evaluation indicators for distributed energy system performance. Based on the diversity and difference of the energy form and grade of cooling, heating and power in the distributed combined cooling, heating, and power (CCHP) system, this paper proposed three-index evaluation system composed of key indicators including relative energy saving rate, exergy efficiency and thermoelectric ratio. In order to further prove the reasonableness and scientificity of the evaluation index system applied in performance evaluation of distributed CCHP system, it enumerated, calculated, and evaluated the energy conservation of three engineering cases. The evaluation results showed that the high energy-saving rate of the system did not mean good energy-saving, but also the efficiency of the system should be examined. Only when the energy saving rate and exergy efficiency were both high, can the energy saving performance of the system be demonstrated. When the energy-saving rate was high and the efficiency was not high, it is shown that the energy-saving of the system had great room for improvement. 本文简要分析了现有分布式能源系统性能评价指标的优缺点。针对分布式冷热电联供（CCHP）系统中输出冷、热、电多样性的能源形式，提出了由热电比、相对节能率和㶲效率三关键指标组成的指标体系。为了进一步证明该评价指标体系在分布式热电联产系统性能评价中的合理性和科学性，列举计算和评价了三个典型工程案例的节能性能。评价结果表明，系统的节能率高并不意味着节能性好，还应考察系统的㶲效率。只有节能率和㶲效率都高的情况下，才能表明系统的节能性好。当节能率高而㶲效率不高时，表明该系统的节能性有很大的提升空间。